i have a function

y(x)

i want to substitute by variable p.

p=y'(x)=dy/dx

every derivative is by dx because its the smallest variable

so why

why dp/dy=p'

i cant see the meaning of derivative by y

??

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- Jul 26th 2009, 11:45 PM #1

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- Jul 27th 2009, 01:52 AM #3

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